Does anyone have experience of paint rectification to address areas of light corrosion?

I've got a 360 with a few areas of light corrosion / paint bubbling that need tidying up. I see that Walkersport can do these repairs and what I need addressing is similar:

https://www.clubscuderia.co.uk/forum...-rectification

Has anyone used them for this? and are there any other companies who can do this, particularly around the Midlands?

Cheers

Andy